Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 8 5.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 08/05/2021   18:29:03   (  71.63,-100.04) 08/05/2021   18:30:13  (  71.57, -98.89)   40.77                70
 08/05/2021   19:19:38   ( -71.17,  68.10) 08/05/2021   19:19:48  ( -71.19,  68.11)    1.86                10
 08/05/2021   20:10:21   (  71.06,-124.40) 08/05/2021   20:09:15  (  71.09,-124.40)    2.89                66
 08/08/2021   10:45:30   (  72.08,  15.07) 08/08/2021   10:46:36  (  71.96,  17.64)   89.25                66
 08/08/2021   11:35:57   ( -71.20,-176.01) 08/08/2021   11:36:18  ( -71.20,-175.99)    0.98                21
 08/08/2021   12:26:40   (  71.10,  -8.52) 08/08/2021   12:25:45  (  71.10,  -8.51)    0.32                55
 08/11/2021   03:52:14   ( -71.18, -60.04) 08/11/2021   03:52:47  ( -71.20, -60.10)    3.32                33
 08/11/2021   04:42:58   (  71.13, 107.37) 08/11/2021   04:42:14  (  71.10, 107.37)    3.55                44
 08/13/2021   20:08:33   ( -71.22,  55.85) 08/13/2021   20:09:17  ( -71.21,  55.78)    2.68                44
 08/13/2021   20:59:17   (  71.17,-136.75) 08/13/2021   20:58:43  (  71.15,-136.66)    3.48                34
 08/16/2021   12:24:52   ( -71.25, 171.73) 08/16/2021   12:25:46  ( -71.26, 171.74)    0.88                54
 08/16/2021   13:15:35   (  71.15, -20.78) 08/16/2021   13:15:13  (  71.15, -20.79)    0.49                22